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Kinetic Investigation of the Solvent-Free Hydrogenation of Dehydroisophytol

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Institute of Process Engineering, ETH Zurich, Sonneggstrasse 3, 8092 Zurich, Switzerland
*E-mail: [email protected]. Tel.: +44 44 632 24 99. Fax: +44 44 632 13 25.
Cite this: Ind. Eng. Chem. Res. 2017, 56, 17, 4929–4937
Publication Date (Web):April 6, 2017
https://doi.org/10.1021/acs.iecr.7b00458
Copyright © 2017 American Chemical Society
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Abstract

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Isophytol is a key intermediate in the industrial synthesis of vitamins, produced by selective hydrogenation of dehydroisophytol. This work presents a study of the kinetics of this process in the absence of any solvent. The experimental data were modeled using power-law kinetic expressions and mechanistic models based on Langmuir–Hinshelwood kinetics. The hypothesis of noncompetitive adsorption between hydrogen and organics was chosen in order to describe the changes in the reactivity of the system at varying temperatures (313–353 K) and pressures (5.0–9.0 bar). A simplified approach was used to describe the kinetics of the overhydrogenation reaction to the corresponding alkane. A list of the relevant kinetic and adsorption parameters, the result of an optimization procedure, is reported. The mathematical model, successfully validated, allows the prediction of the influence of the operating conditions and of the addition of quinoline, as reaction modifier, on the selectivity of the process.

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The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acs.iecr.7b00458.

  • Physical properties of commercial Lindlar catalyst and DIP; analysis of mass transfer limitations; additional experimental and simulated kinetic results (PDF)

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Cited By

This article is cited by 2 publications.

  1. Linda Zh. Nikoshvili, Nadezhda A. Nemygina, Tatiana E. Khudyakova, Irina Yu. Tiamina, Alexey V. Bykov, Barry D. Stein, Esther M. Sulman, Lioubov Kiwi-Minsker. Pd Nanoparticles Stabilized by Hypercrosslinked Polystyrene Catalyze Selective Triple C-C Bond Hydrogenation and Suzuki Cross-Coupling. Journal of Nanomaterials 2019, 2019 , 1-7. https://doi.org/10.1155/2019/6262176
  2. Sergio Vernuccio, David Dempfle, Roman Goy, Jonathan Medlock, Philipp Rudolf von Rohr. External mass transfer in a laser sintered structured reactor for continuous hydrogenation of alkynes. Chemical Engineering and Processing - Process Intensification 2018, 126 , 74-80. https://doi.org/10.1016/j.cep.2018.02.005

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